Washing additive feeding device and control method

Abstract

The invention discloses a washing additive feeding device and a control method, and the device comprises two liquid storage cavities which are respectively used for storing different washing additives; the suction pump is used for providing suction acting force; the two liquid storage cavities are communicated with a suction pump through liquid suction channels which are in one-to-one correspondence; valve plugs are respectively arranged in the two liquid pumping channels, and the two valve plugs are connected through a connecting rod; and the control unit is arranged on the body of the feeding device and is used for driving the two connected valve plugs to move together and controlling one of the two liquid extraction channels to be communicated. By means of the arrangement, the valve plugs in the two liquid pumping channels are connected into a whole, linkage switching control can be conducted on the two connected valve plugs through the same control unit, and the effect that one of the two liquid pumping channels is selectively conducted through the single control unit is achieved; and therefore, the remarkable technical progress that different washing additives connected with different channels are switched and fed by using a single suction pump is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of household washing appliances, and specifically, relates to a washing additive dispensing device; in particular, relates to a linkage switching valve of the washing additive dispensing device; in particular, also relates to a control method of the above-mentioned washing additive dispensing device. Background Art

[0002] With the continuous improvement of people's living standards, washing machines have become one of the essential household appliances for family life. The drum washing machines and fully automatic pulsator washing machines in the prior art are usually provided with a washing additive delivery device for delivering detergent into the washing tub of the washing machine; generally, under the action of the water flow of the washing machine, the washing additive manually or automatically drawn and added by the user in the washing additive delivery device is flushed into the washing tub of the washing machine to achieve the purpose of delivering and using the washing additive. The above-mentioned washing additive can be any one or a combination of existing additives that can improve the treatment effect of clothes, such as detergents, softeners, disinfectants, etc.

[0003] Existing delivery devices generally install a suction pump on each delivery water channel, and use the suction force of the pump to draw the detergent additives into the corresponding delivery water channel, so as to achieve the effect of delivering the extracted detergent additives into the washing machine barrel together with the incoming water flow; however, the cost of the above-mentioned suction pump is relatively high, and installing a suction pump on each water channel for corresponding delivery of different detergent additives will greatly increase the cost of the delivery device.

[0004] Therefore, how to achieve the use of the same suction pump for the delivery of different detergent additives has become a technical problem that needs to be solved urgently.

[0005] In addition, the existing switching structure cannot realize the linkage switching of different water channels, and it is even more impossible to achieve the effect of accurately switching and efficiently delivering different washing additives by sharing a suction pump.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a washing additive dispensing device and a control method to achieve the purpose of automatically extracting and dispensing different types of washing additives.

[0008] The present invention also provides a washing additive dispensing device and a control method, so as to realize the dispensing of different washing additives by sharing a suction pump, thereby achieving the purpose of reducing the cost of the dispensing device.

[0009] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0010] A washing additive dispensing device comprises: two liquid storage chambers, each used to store different washing additives; a suction pump, providing a suction force; the two liquid storage chambers are connected to the suction pump via corresponding liquid pumping channels; valve plugs are respectively provided in the two liquid pumping channels, and the two valve plugs are connected via a connecting rod; a control unit is installed on the body of the dispensing device, and is used to drive the two connected valve plugs to move together, and control the two liquid pumping channels to selectively conduct.

[0011] Furthermore, the control unit includes: an elastic element, which connects the valve plug and / or the connecting rod to the body of the delivery device, and is used to keep the two valve plugs and the connecting rod in an initial position; a driving element, which is installed on the body of the delivery device, and is used to drive the two valve plugs and the connecting rod to move to a switching position.

[0012] Furthermore, when the two valve plugs and the connecting rod are in the initial position, the first valve plug opens the first liquid pumping channel and the second valve plug disconnects the second liquid pumping channel; when the two valve plugs and the connecting rod are in the switching position, the first valve plug disconnects the first liquid pumping channel and the second valve plug opens the second liquid pumping channel.

[0013] Furthermore, the two liquid pumping channels are vertically arranged in parallel up and down, and valve plugs that can move horizontally along the radial direction of the channel are respectively provided in the middle of the two liquid pumping channels, and the two valve plugs are connected via a connecting rod; a driving element is provided on the side of the first valve plug away from the second liquid pumping channel, the driving element is installed on the main body of the delivery device and is spaced apart from the first valve plug, the driving element is an electromagnet, which generates a magnetic attraction force for pulling the two valve plugs and the connecting rod to move in the direction of the electromagnet after being energized; an elastic element is connected to the side of the second valve plug away from the first liquid pumping channel, the elastic element is a horizontally extending spring, and both ends of the spring are respectively connected to the second valve plug and the main body of the delivery device; preferably, the connecting rod extends horizontally along the radial direction of the liquid pumping channel, and the spring and the connecting rod are coaxially arranged.

[0014] Furthermore, the suction pump includes: a pump chamber; a piston rod, which is movable up and down in the pump chamber; a motor, the output end of the motor is connected to the piston rod via a transmission structure, and is used to drive the piston rod to reciprocate in the pump chamber; the outlets of the two liquid extraction channels are both connected to the pump chamber; the pump chamber is also connected to the inlet of a delivery channel, and the delivery channel is used to deliver the extracted detergent additive outward; preferably, the output end of the motor is an output shaft, and a cam is installed on the output shaft, and an eccentric shaft is provided at the eccentric position of the cam, and a horizontal slide groove is provided on the piston rod for the corresponding insertion of the eccentric shaft, so that the piston rod is driven to reciprocate in the pump chamber during the rotation of the output shaft of the motor.

[0015] Furthermore, a positive one-way valve is respectively provided in the two liquid extraction channels to ensure that the liquid extraction channels are only unidirectionally conducted from the liquid storage chamber connecting end to the suction pump connecting end; a negative one-way valve is provided in the delivery channel to ensure that the delivery channel is only unidirectionally conducted from the suction pump connecting end to the delivery outlet; preferably, the positive one-way valve provided in the liquid extraction channel is located downstream of the valve plug.

[0016] The present invention also provides a control method for any of the above-mentioned washing additive dosing devices, which includes, when the first washing additive / second washing additive in the first liquid storage chamber / second liquid storage chamber is dosed, the control unit drives the two valve plugs and the connecting rod to be in an initial position / switching position to connect the first liquid pumping channel / second liquid pumping channel.

[0017] Furthermore, when the first washing additive is added into the first liquid storage chamber, the electromagnet is in a power-off state, the two valve plugs and the connecting rod are maintained in the initial position under the action of the spring, the first valve plug opens the first liquid pumping channel, and the second valve plug disconnects the second liquid pumping channel; when the second washing additive is added into the second liquid storage chamber, the electromagnet is in a power-on state, the two valve plugs and the connecting rod receive the magnetic driving force of the electromagnet, overcome the spring force and move toward the electromagnet to the switching position, the first valve plug disconnects the first liquid pumping channel, and the second valve plug opens the second liquid pumping channel.

[0018] Furthermore, when the detergent additive is released into the liquid storage chamber, the suction pump performs the following steps: the motor of the suction pump rotates forward for a first set time t1, a suction force is generated in the pump chamber, and the detergent additive in the corresponding liquid storage chamber is pumped into the pump chamber by using a conductive liquid pumping channel; the motor of the suction pump rotates forward for a second set time t2, an outward displacement force is generated in the pump chamber, and the detergent additive extracted from the pump chamber is released outward through the delivery channel.

[0019] Furthermore, when the detergent additive in the liquid storage chamber is released, the amount of the detergent additive released outward from the release channel is cumulatively measured; every time t1+t2 is executed, it is determined whether the cumulative measured amount reaches the set release amount; if so, the release of the detergent additive is stopped; if not, the motor of the suction pump is controlled to continue working, and forward and reverse rotation are performed in sequence again.

[0020] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0021] Through the above-mentioned arrangement, the present invention connects the valve plugs in the two liquid pumping channels as a whole, and can use the same control unit to perform linkage switching control on the two connected valve plugs, thereby achieving the effect of selectively connecting one of the two liquid pumping channels using a single control unit, thereby achieving significant technical progress in using a single suction pump to switch and release different washing additives connected to different channels.

[0022] At the same time, the invention has a simple structure, a concise method, and a significant effect, and is suitable for popularization and use.

[0023] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0025] Figure 1 is a structural schematic diagram of the initial position of the washing additive delivery device in an embodiment of the present invention;

[0026] Figure 2 is a structural schematic diagram of the switching position of the washing additive dispensing device in an embodiment of the present invention;

[0027] Figure 3 2 is a schematic structural diagram of a horizontal cross section of a disc-shaped chamber of a washing additive delivery device according to an embodiment of the present invention;

[0028] Figure 4 Flow chart of a method for controlling the placement of washing additives in an embodiment of the present invention.

[0029] The main components in the figure are described as follows:

[0030] 1. Liquid storage chamber; 2. Suction pump; 3. Liquid extraction channel; 4. Delivery channel; 5. Control unit; 6. One-way valve; 7. Valve plug; 8. Main body; 11. First liquid storage chamber; 12. Second liquid storage chamber; 21. Pump chamber; 22. Motor; 23. Cam; 24. Piston rod; 25. Slide; 26. Eccentric shaft; 240. Piston; 31. First liquid extraction channel; 32. Second liquid extraction channel; 33. Avoidance groove; 41. Disc-shaped chamber; 51. Driving element; 52. Elastic element; 510. Electromagnet; 520. Spring; 61. Positive one-way valve; 62. Negative one-way valve; 71. First valve plug; 72. Second valve plug; 73. Connecting rod.

[0031] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figures 1 to 4 As shown, an embodiment of the present invention introduces a washing additive dispensing device, which includes: two liquid storage chambers 1, each used to store different washing additives; a suction pump 2, providing a suction force; the two liquid storage chambers 1 are connected to the suction pump 2 via a one-to-one corresponding liquid pumping channel 3, wherein the first liquid pumping channel 31 connects the first liquid storage chamber 11 and the suction pump 2, and the second liquid pumping channel 32 connects the second liquid storage chamber 12 and the suction pump 2; valve plugs 7 are respectively provided in the two liquid pumping channels 3, namely a first valve plug 71 in the first liquid pumping channel 31 and a second valve plug 72 in the second liquid pumping channel 32, and the first valve plug 71 and the second valve plug 72 are connected via a connecting rod 73; a control unit 5 is installed on the body 8 of the dispensing device, and is used to drive the two connected valve plugs 7 to move together, and control the two liquid pumping channels 3 to be selectively connected.

[0035] Through the above-mentioned arrangement, the present invention connects the valve plugs in the two liquid pumping channels as a whole, and can use the same control unit to perform linkage switching control on the two connected valve plugs, thereby achieving the effect of selectively connecting one of the two liquid pumping channels using a single control unit, thereby achieving significant technical progress in using a single suction pump to switch and release different washing additives connected to different channels.

[0036] In the embodiment of the present invention, the main body 8 of the delivery device includes a shell, in which an integrated water circuit is arranged, and the integrated water circuit constitutes the above-mentioned liquid extraction channel 3 and the delivery channel 4 described below; a chamber can also be arranged in the shell, in which a delivery box that can be pulled outward is installed, and the delivery box is installed with an independently packaged or integrated liquid storage chamber 1.

[0037] In the embodiment of the present invention, the washing additive can be any additive in the prior art that can be used to treat clothes, such as detergent, rinse agent, softener, etc. For the convenience of description, the present invention is described below by taking the first washing additive as a detergent and the second washing additive as a softener as an example.

[0038] In an embodiment of the present invention, the control unit 5 includes: an elastic element 52, which connects the valve plug 7 and / or the connecting rod 73 to the main body 8 of the delivery device, and is used to keep the two valve plugs 7 and the connecting rod 73 in an initial position; a driving element 51, which is installed on the main body 8 of the delivery device, and is used to drive the two valve plugs 7 and the connecting rod 73 to move to a switching position.

[0039] By installing elastic elements and driving elements on the washing additive dispensing device, the valve plugs connected in two different liquid extraction channels can be synchronously maintained in the initial position by the same elastic element and synchronously moved to the switching position by the same driving element, thereby achieving the effect of synchronous movement and linked opening and closing of the valve plugs connected in different channels, thereby achieving the effect of the dispensing device selectively extracting and dispensing different washing additives.

[0040] In the embodiment of the present invention, when the two valve plugs 7 and the connecting rod 73 are in the initial position, the first valve plug 71 is in the open position, the first liquid pumping channel 31 is connected, and the second valve plug 72 is in the closed position, and the second liquid pumping channel 32 is disconnected; when the two valve plugs 7 and the connecting rod 73 are in the switching position, the first valve plug 71 is in the closed position, the first liquid pumping channel 31 is disconnected, and the second valve plug 72 is in the open position, and the second liquid pumping channel 32 is connected.

[0041] like Figures 1 to 3 As shown, in the embodiment of the present invention, two liquid pumping channels 3 are vertically arranged in parallel up and down, and valve plugs 7 which can move horizontally along the radial direction of the channel are respectively provided in the middle of the two liquid pumping channels 3, and the two valve plugs 7 are connected by a connecting rod 73; preferably, the two valve plugs 7 are at the same height, and the connecting rod 73 extends horizontally, and the two ends of the horizontally extended connecting rod 73 respectively extend into the corresponding liquid pumping channels 3 and are connected with the corresponding valve plugs 7, so that the valve plugs 7 in different liquid pumping channels 3 are connected as a whole through the connecting rod 73.

[0042] A radially outwardly protruding avoidance groove 33 is provided on the liquid pumping channel 3, so that the valve plug 7 can at least partially move horizontally into the avoidance groove 33 to open the corresponding cross-section of the blocked liquid pumping channel, thereby achieving the purpose of connecting the liquid pumping channel 3 after the valve plug moves into the avoidance groove 33, and disconnecting the liquid pumping channel 3 when the valve plug is completely moved into the liquid pumping channel 3, thereby achieving a significant technical progress in switching the liquid pumping channel 3 on and off by using the valve plug.

[0043] The radial dimension of the valve plug 7 is greater than or equal to the cross-section of the liquid pumping channel 3 on the upstream and / or downstream sides of the avoidance groove 33. When the elastic element 52 pulls the valve plug 7 to be in the initial position in the liquid pumping channel 3, the axis of the valve plug 7 coincides with the axis of the liquid pumping channel 3. A sealing ring is provided at the place where the valve plug 7 is connected to the inner wall of the liquid pumping channel 3 on the side facing the upstream and / or downstream side of the avoidance groove 33, so as to disconnect the liquid pumping channel 3.

[0044] The avoidance groove 33 of the first pumping channel 31 protrudes toward one side of the driving element 51, and the avoidance groove 33 of the second pumping channel 32 protrudes toward the same radial direction. The bottom of the avoidance groove 33 of the second pumping channel 32 is provided with a perforation, and the avoidance groove 33 of the first pumping channel 31 is also provided with a perforation in the relative radial direction. The self-perforations at both ends of the connecting rod 73 respectively extend into the corresponding pumping channels 3 and are connected to the valve plug 7 in the pumping channel 3; at least one circle of sealing ring is respectively provided at the connection between the above two perforations and the connecting rod 73 to ensure effective sealing at the connection rod passing through.

[0045] In an embodiment of the present invention, a driving element 51 is provided on the side of the first valve plug 71 away from the second liquid pumping channel 32, and the driving element 51 is installed on the main body 8 of the delivery device; the driving element 51 can be any existing structure that can pull the first valve plug 71 to move toward the driving element 51, such as: a linear motor, a pulling motor, etc.; in an embodiment of the present invention, the driving element 51 is taken as an electromagnet 510 as an example for explanation, and a certain interval is maintained between the electromagnet 510 and the first valve plug 71, and at least a part of the first valve plug 71 is made of iron material that can be adsorbed by the electromagnet 510, so that after the electromagnet 510 is energized, a magnetic attraction force is generated to pull the first valve plug 71 to move toward the electromagnet 510, thereby achieving the purpose of synchronously moving the first valve plug 71 and the second valve plug 72 connected by the connecting rod 73 toward the electromagnet 510.

[0046] In the embodiment of the present invention, an elastic element 52 is connected to the side of the second valve plug 72 away from the first liquid extraction channel 31. The elastic element 52 can be any existing structure that can provide elastic retaining force to keep the second valve plug 72 in the initial position, such as: a pneumatic rod, a hydraulic rod, a spring 520, etc.; in the embodiment of the present invention, the elastic element 52 is taken as a horizontally extending spring 520 as an example for explanation, and the two ends of the spring 520 are respectively connected to the second valve plug 72 and the main body 8 of the delivery device, so that the spring 520 provides elastic supporting force to the second valve plug 72 and drives the second valve plug 72 to remain in the initial position, thereby realizing the synchronization of maintaining the first valve plug 71 and the second valve plug 72 connected by the connecting rod 73 in the initial position; preferably, the connecting rod 73 extends horizontally along the radial direction of the liquid extraction channel 3, and the spring 520 and the connecting rod 73 are coaxially arranged to effectively avoid the two valve plugs 7 from being offset up and down and effectively ensure that the two valve plugs 7 can be moved synchronously through the action of the driving element 51.

[0047] In the embodiment of the present invention, the suction pump 2 can be any pump structure in the prior art that can provide a suction force for the detergent additive, such as a piston pump, an electromagnetic pump, etc. In the embodiment of the present invention, the suction pump 2 is taken as an example of a piston pump for discussion:

[0048] like Figures 1 to 3As shown, the suction pump 2 includes a pump chamber 21, which is a cavity for washing additives to flow in and out; a piston rod 24, which is arranged in the pump chamber 21 and can move up and down; a motor 22, and the output end of the motor 22 is connected to the piston rod 24 through a transmission structure, which is used to drive the piston rod 24 to reciprocate in the pump chamber 21. Preferably, the pump chamber 21 is strip-shaped, with one end closed and the other end having an opening; the piston rod 24 is coaxially arranged in the pump chamber 21, the piston end of the piston rod 24 is arranged inside the pump chamber 21, and the rod end passes through the sealed end of the pump chamber 21, and the piston end is provided with a piston 240 corresponding to the cross section of the pump chamber 21, so as to use the reciprocating movement of the piston to promote the negative pressure and positive pressure in the pump chamber; the rod end that passes through is connected to the output end of the motor 22 through a transmission structure.

[0049] Preferably, the output end of the motor 22 is an output shaft, on which a cam 23 is mounted, an eccentric shaft 26 is provided at an eccentric position of the cam 23, and a horizontal slide groove 25 is provided on the piston rod 24 for the eccentric shaft 26 to be inserted, so that the output shaft of the motor 22 drives the piston rod 24 to produce reciprocating motion in the pump chamber 21 during rotation.

[0050] In the embodiment of the present invention, the outlets of the first pumping channel 31 and the second pumping channel 32 are both connected to the pump chamber 21; the pump chamber 21 is also connected to the inlet of a delivery channel 4, and the delivery channel 4 is used to deliver the washing additive extracted into the pump chamber 21. The outlets of the two pumping channels 3 and the inlet of the delivery channel 4 are both connected to the inside of the pump chamber 21 through openings, so that the inside of the pump chamber 21 is connected to the two pumping channels 3 and the one delivery channel 4 through the openings. Preferably, in order to facilitate the connection between the outlets of the two pumping channels 3 and the inlet of the delivery channel 4 and the pump chamber 21, the delivery channel 4 is arranged in parallel with the two pumping channels 3, the inlet of the delivery channel 4 and the outlets of the two pumping channels 3 are on the same side, the opening of the pump chamber 21 is coaxially connected to one end of a disc-shaped chamber 41, and the other end of the disc-shaped chamber 41 is respectively connected to the outlet of the first pumping channel 31, the outlet of the second pumping channel 32, and the inlet of the delivery channel 4 at different positions, so as to ensure that the three different channels can be connected to the pump chamber 21.

[0051] In the embodiment of the present invention, a positive check valve 61 is respectively provided in the first pumping channel 31 and the second pumping channel 32, which is used to ensure that the pumping channel 3 is only unidirectionally connected from the connection end of the liquid storage chamber 1 to the connection end of the suction pump 2; a negative check valve 62 is provided in the delivery channel 4, which is used to ensure that the delivery channel 4 is only unidirectionally connected from the connection end of the suction pump 2 to the delivery outlet. By respectively providing check valves 6 with different directions on the pumping channel 3 and the delivery channel 4, when the suction pump 2 drives the piston rod 24 to move in different directions, it is possible to select only one of them to be connected with the pumping channel 3 or the delivery channel 4, so as to achieve the different purposes of extracting the washing additive in the liquid storage chamber 1 into the pump chamber 21 and delivering the washing additive extracted from the pump chamber 21 to the outside, thereby achieving the effect of automatically pumping and delivering the washing additive in the liquid storage chamber 1.

[0052] Preferably, the positive one-way valve 61 provided in the liquid pumping channel 3 is located downstream of the valve plug 7 to prevent the one-way valve 6 from interfering with the movement of the valve plug 7 in the liquid pumping channel; at the same time, the positive one-way valve 61 is arranged at the connection point between the liquid pumping channel 3 and the pump chamber 21, so that the one-way valve 6 can directly prevent the liquid in the pump chamber 21 from flowing toward the liquid pumping channel, thereby improving the suction effect of the suction pump 2; and in order to further improve the suction effect of the suction pump 2, the negative one-way valve 62 can be arranged at the connection point between the delivery channel 4 and the pump chamber 21.

[0053] In the embodiment of the present invention, when the piston rod 24 of the suction pump 2 moves outward, the pump chamber 21 is connected to the liquid storage chamber 1 through the connected liquid pumping channel 3, and the negative pressure generated in the pump chamber 21 due to the outward movement of the piston rod 24 is transmitted to the corresponding liquid storage chamber 1 through the positive one-way valve 61, and the negative one-way valve 62 prevents the negative pressure from being transmitted, so that the negative pressure draws the detergent additive in the corresponding liquid storage chamber 1 into the pump chamber 21; then, when the piston rod 24 moves inward, the pump chamber 21 is squeezed to generate positive pressure, and the positive pressure is prevented from being transmitted by the positive one-way valve 61, pushing the negative one-way valve 62 to open, and the detergent additive extracted from the pump chamber 21 is released outward through the release channel 4 by the positive pressure.

[0054] like Figures 1 to 4 As shown, the embodiment of the present invention also introduces a control method of the above-mentioned washing additive delivery device, which includes: when delivering the first washing additive / the second washing additive in the first liquid storage chamber 11 / the second liquid storage chamber 12, the control unit 5 drives the two valve plugs 7 and the connecting rod 73 to be in the initial position / the switching position, and the first pumping channel 31 / the second pumping channel 32 are connected. Through the above method, the effect of linkage delivery control of different washing additives is achieved, thereby achieving a significant technical progress of linkage switching delivery of different washing additives using a single suction pump.

[0055] In the embodiment of the present invention, when the first washing additive is added into the first liquid storage chamber 11,

[0056] The electromagnet 510 is in a power-off state, the first valve plug 71, the second valve plug 72 and the connecting rod 73 are kept in the initial position under the action of the spring 520, the first valve plug 71 opens the first liquid pumping channel 31, and the second valve plug 72 disconnects the second liquid pumping channel 32;

[0057] When the second washing additive in the second liquid storage chamber 12 is added,

[0058] The electromagnet 510 is in an energized state. Under the pull of the magnetic driving force generated by the electromagnet 510, the first valve plug 71, the second valve plug 72 and the connecting rod 73 overcome the elastic force of the spring 520 and move toward the electromagnet 510 to a switching position. The first valve plug 71 disconnects the first liquid pumping channel 31, and the second valve plug 72 opens the second liquid pumping channel 32.

[0059] In the embodiment of the present invention, when the detergent additive is added into the liquid storage chamber 1, the suction pump 2 performs the following steps:

[0060] Step S101. The motor 22 of the suction pump 2 rotates forward for a first set time t1, a suction force is generated in the pump chamber 21, and the detergent additive in the corresponding liquid storage chamber 1 is sucked into the pump chamber 21 by using the connected selected liquid pumping channel 3;

[0061] Step S102 . The motor 22 of the suction pump 2 rotates forward for a second set time t2 , and an outward displacement force is generated in the pump chamber 21 , and the washing additive extracted from the pump chamber 21 is released to the outside through the release channel 4 .

[0062] When the first washing additive in the first liquid storage chamber 11 or the second washing additive in the second liquid storage chamber 12 is added, the suction pump 2 continuously and cyclically executes the above steps S101 and S102 to continuously extract and add the first washing additive in the first liquid storage chamber 11 or the second washing additive in the second liquid storage chamber 12, thereby achieving the effect of automatically extracting and adding the washing additives.

[0063] In the embodiment of the present invention, when the detergent additive in the liquid storage chamber 1 is released, the amount of the detergent additive released outward from the release channel 4 is cumulatively measured; every time t1+t2 is executed, it is determined whether the cumulative measured amount reaches the set release amount; if so, the release of the detergent additive is stopped; if not, the motor of the suction pump 2 is controlled to continue working, and forward and reverse rotation are performed in sequence again.

[0064] like Figure 4 As shown, in the embodiment of the present invention, when the washing additive delivery device delivers the first washing additive in the first liquid storage chamber 11, the specific steps are as follows:

[0065] S11. The electromagnet 510 is in a power-off state, the first valve plug 71, the second valve plug 72 and the connecting rod 73 are kept in the initial position under the action of the spring 520, the first valve plug 71 is in an open position, the first pumping channel 31 connects the first liquid storage chamber 11 with the pump chamber 21 of the suction pump 2, the second valve plug 72 is in a disconnected position, and the second pumping channel 32 is disconnected;

[0066] S12. The motor 22 of the suction pump 2 rotates forward for a first set time t1, and a negative pressure suction force is generated in the pump chamber 21, and the first washing additive in the first liquid storage chamber 11 is pumped into the pump chamber 21 by using the first liquid pumping channel 31;

[0067] S13. The motor 22 of the suction pump 2 rotates forward for a second set time t2, and a positive pressure discharge force is generated in the pump chamber 21, and the washing additive extracted from the pump chamber 21 is released outward through the delivery channel 4;

[0068] S14. Determine whether the cumulative amount of the detergent additive released from the release channel 4 reaches the set release amount; if so, execute step S15; if not, execute step S12 again;

[0069] Step S15: After the delivery is completed, the motor 22 stops working.

[0070] like Figure 4 As shown, in the embodiment of the present invention, when the washing additive delivery device delivers the second washing additive in the second liquid storage chamber 12, the specific steps are as follows:

[0071] S21. The electromagnet 510 is in the energized state, and the first valve plug 71, the second valve plug 72 and the connecting rod 73 move to the switching position under the adsorption effect of the electromagnetic driving force generated by the electromagnet 510, the first valve plug 71 is in the disconnected position, and the first pumping channel 31 is disconnected; the second valve plug 72 is in the open position, and the second pumping channel 32 connects the second liquid storage chamber 12 with the pump chamber 21 of the suction pump 2;

[0072] S12. The motor 22 of the suction pump 2 rotates forward for the first set time t1, and a negative pressure suction force is generated in the pump chamber 21, and the second washing additive in the second liquid storage chamber 12 is pumped into the pump chamber 21 by the second liquid pumping channel 32;

[0073] S13. The motor 22 of the suction pump 2 rotates forward for a second set time t2, and a positive pressure discharge force is generated in the pump chamber 21, and the washing additive extracted from the pump chamber 21 is released outward through the delivery channel 4;

[0074] S14. Determine whether the cumulative amount of the detergent additive released from the release channel 4 reaches the set release amount; if so, execute step S15; if not, execute step S12 again;

[0075] Step S15: After the delivery is completed, the motor 22 stops working.

[0076] Preferably, in the embodiment of the present invention, when the washing additive dispensing device dispenses the first washing additive or the second washing additive, the forward rotation time t1 and the reverse rotation time t2 of the motor 22 can be set to different set values ​​respectively to adapt to the dispensing of washing additives of different concentrations and types.

[0077] Of course, when the washing machine executes different programs and the first detergent additive is added, the forward rotation time t1 and the reverse rotation time t2 of the motor 22 can also be set to different set values; similarly, when the washing machine executes different programs and the second detergent additive is added, the forward rotation time t1 and the reverse rotation time t2 of the motor 22 can also be set to different set values. Thus, different models of washing machines and different laundry processing programs can be used to add different amounts and at different rates.

[0078] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A washing additive dispensing device, comprising: Two liquid storage chambers, each for storing different detergent additives; A suction pump, providing a suction force; The two liquid storage chambers are connected to the suction pump via one-to-one corresponding liquid extraction channels; Features: The two pumping channels are respectively provided with valve plugs, and the two valve plugs are connected via a connecting rod; The control unit is installed on the body of the delivery device and is used to drive the two connected valve plugs to move together and control one of the two liquid extraction channels to be connected.

2. A washing additive delivery device according to claim 1, characterized in that: The control unit comprises, An elastic element connects the valve plug and / or the connecting rod to the body of the delivery device and is used to keep the two valve plugs and the connecting rod in the initial position; The driving element is installed on the body of the delivery device and is used to drive the two valve plugs and the connecting rod to move to the switching position.

3. A washing additive delivery device according to claim 2, characterized in that: When the two valve plugs and the connecting rod are in the initial position, the first valve plug opens the first liquid pumping channel, and the second valve plug disconnects the second liquid pumping channel; When the two valve plugs and the connecting rod are in the switching position, the first valve plug disconnects the first liquid pumping channel, and the second valve plug opens the second liquid pumping channel.

4. A washing additive delivery device according to claim 3, characterized in that: Two liquid extraction channels are vertically arranged in parallel, and valve plugs that can move horizontally along the radial direction of the channels are respectively arranged in the middle of the two liquid extraction channels, and the two valve plugs are connected via a connecting rod; A driving element is provided on the side of the first valve plug away from the second liquid extraction channel. The driving element is installed on the body of the injection device and is spaced apart from the first valve plug. The driving element is an electromagnet, which generates a magnetic attraction force to pull the two valve plugs and the connecting rod to move in the direction of the electromagnet after being energized. An elastic element is connected to the side of the second valve plug facing away from the first liquid extraction channel. The elastic element is a horizontally extending spring, and both ends of the spring are respectively connected to the second valve plug and the body of the delivery device; Preferably, the connecting rod extends horizontally along the radial direction of the liquid pumping channel, and the spring is coaxially arranged with the connecting rod.

5. A washing additive dosing device according to any one of claims 1 to 4, characterized in that: Suction pump includes, Pump chamber; A piston rod is disposed in the pump chamber so as to be movable up and down; The motor, the output end of which is connected to the piston rod via a transmission structure, is used to drive the piston rod to generate reciprocating motion in the pump chamber; The outlets of the two liquid extraction channels are both connected to the pump chamber; The pump chamber is also connected to the inlet of a delivery channel, and the delivery channel is used to deliver the extracted detergent additive outward; Preferably, the output end of the motor is an output shaft, the output shaft is equipped with a cam, an eccentric shaft is provided at the eccentric position of the cam, and a horizontal slide groove is provided on the piston rod for the corresponding insertion of the eccentric shaft, so that the output shaft of the motor drives the piston rod to produce reciprocating motion in the pump chamber during rotation.

6. A washing additive delivery device according to claim 5, characterized in that: A positive check valve is respectively provided in the two liquid extraction channels to ensure that the liquid extraction channels are only unidirectionally conducted from the liquid storage chamber connection end to the suction pump connection end; A negative one-way valve is provided in the delivery channel to ensure that the delivery channel is only unidirectional from the suction pump connection end to the delivery outlet; Preferably, the forward one-way valve provided in the liquid extraction channel is located downstream of the valve plug.

7. A control method for a washing additive dosing device according to any one of claims 1 to 6, characterized in that: When the first washing additive / the second washing additive is added into the first liquid storage chamber / the second liquid storage chamber, the control unit drives the two valve plugs and the connecting rod to the initial position / the switching position, and connects the first liquid pumping channel / the second liquid pumping channel.

8. The control method of a washing additive delivery device according to claim 7, characterized in that: When the first washing additive is added into the first liquid storage chamber, The electromagnet is in a power-off state, the two valve plugs and the connecting rod are kept in the initial position under the action of the spring, the first valve plug opens the first liquid pumping channel, and the second valve plug disconnects the second liquid pumping channel; When the second washing additive is added into the second liquid storage chamber, When the electromagnet is powered on, the two valve plugs and the connecting rod receive the magnetic driving force of the electromagnet and overcome the spring force to move toward the electromagnet to the switching position. The first valve plug disconnects the first liquid extraction channel and the second valve plug opens the second liquid extraction channel.

9. A control method for a washing additive dosing device according to claim 7 or 8, characterized in that: When the detergent additive is added to the liquid storage chamber, the suction pump performs the following steps: The motor of the suction pump rotates forward for a first set time t1, and a suction force is generated in the pump cavity, and the detergent additive in the corresponding liquid storage cavity is sucked into the pump cavity by using the conductive selected liquid suction channel; The motor of the suction pump rotates forward for a second set time t2, and an outward displacement force is generated in the pump cavity, and the detergent additive extracted from the pump cavity is released to the outside through the release channel.

10. The control method of a washing additive delivery device according to claim 9, characterized in that: When the detergent additive in the liquid storage chamber is put in, the amount of the detergent additive put out from the putting channel is cumulatively measured; Every time t1+t2 is executed, it is determined whether the accumulated metering amount has reached the set delivery amount; If so, the addition of the detergent additive is stopped; if not, the motor of the suction pump is controlled to continue working, and the motor is rotated forward and reversed in sequence again.

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